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About Us

CEO – Sherri Gastelum

Sherri Gastelum is the founder of Platinum Tax Defenders LLC and has been a Senior Business professional with 25+ years of experience in new business generation, corporate business including marketing, sales, relationship management and operations. Specialize in working in the accounting, tax and business consultancy field. Sherri has expertise working with clients and prospects to provide the best solution possible. Previously worked for PricewaterhouseCoopers, Deloitte, RSM McGladrey and others before starting her own tax resolution firm. Earned a BBA in Business from the University of Louisiana in Monroe, Louisiana. Has most recently been in charge of running the day to day operations of Platinum Tax Defenders LLC. Responsibilities include client acquisition, client service, and financial operations of the firm as well as M & A opportunities.

Platinum Tax Defenders was founded by Sherri Gastelum because there were so many firms that were taking people’s money but not providing the services. Sherri envisions Platinum Tax Defenders as the shining example of what a tax resolution firm should be.


Worldwide Who’s Who
Better Business Bureau
National Association of Professional Women
Valley Industry and Commerce Association
PWC Alumni Group

International Women’s Leadership Association
National Association of Women Business Owners
Association of Corporate Growth
Financial Executive Institute
Deloitte Alumni Group


  • Lifetime member of Worldwide Who's Who (WWW)
  • Top Female Executive in honor of outstanding professional excellence and dedication by WWW
  • Recognized as the 2013 Entrepreneur of the Year representing the Tax Industry by WWW
  • Woman of Outstanding Leadership recognized by the International Woman’s Leadership Association
  • "A" rating with the Better Business Bureau
  • Recognized as the Top Tax Firm in the Best of Magazines in Southern California Area

Director of Operations – Erik Anderson

Erik has been leading successful sales operations for the past 25 years.  As an expert in business development and identifying growth opportunities, Erik has built a reputation as a seasoned building successful teams and designing training programs. Using his expertise in business development, Erik has built sales teams, organized new departments, and designed successful operations. He has been involved in helping organizations leap to the next level of their evolution, whether they are emerging departments, growing business units, or entirely new operations. 

Director of Client Service – Robert Stevens

Robert has over 30 years of customer service experiences in the financial services industry.  His expertise is dealing with our clients and helping obtain the best customer service with our team.  He has a Masters of Business and has focused on training and procedures.  

Enrolled Agent – Kenneth Steinhorn

Over 30 years of experience in the financial services industry and over 10 + years specializing in tax preparation and tax resolution representing tax payers to the various taxing authorities.  Kenneth has extensive knowledge of the collections process, tax code and regulations necessary to investigate and resolve complex tax matters and is a member of the National organization of Enrolled Agents.